Budget Act Article 51

The general budget proposal shall be forwarded to the Legislative Yuan for deliberation and approval one (1) month prior to the beginning of a new fiscal year, and then announced by the President fifteen (15) days prior to the beginning of a new fiscal year. For the part of the budget containing any classified information, it shall not be announced publicly.
中文原文 預算法第51條
總預算案應於會計年度開始一個月前由立法院議決,並於會計年度開始十五日前由總統公布之;預算中有應守秘密之部分,不予公布。

English translation for reference only; the Chinese text prevails. Not legal advice.